Power Converters for Small- to Large-Scale Photovoltaic Power Plants

This chapter presents an extensive literature survey on various different aspects of medium-voltage (MV) converter development for step-up-transformer-less direct grid integration of photovoltaic (PV) power plants. The main objective was to show how power electronic converter topologies, power electronic devices, and control complexities have affected the development of the MV converter and how to make an excellent choice of the converter topology for step-up-transformer-less grid integration through the MV converter. Besides the traditional system, which requires a step-up transformer to connect the renewable power plants to the grids, other recently proposed converter topologies for step-up-transformer-less direct grid interconnection are also introduced in detail with the aim of presenting a complete picture of power converter topologies for small- to large-scale PV power plants.

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